for heavy rain would not only wash away the soil but would cause serious floods as well
题目
for heavy rain would not only wash away the soil but would cause serious floods as well
这句话中两个would 是什么用法
答案
因为大雨不仅会冲走土壤,而且也会导致严重的洪水.这两个would都是will的过去式,表示过去将来.
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已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
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